<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<!-- 设置v-once后，只能执行一次性插值 -->
		<div v-once id="app">{{a}}</div>
		<script type="text/javascript">
		var json={a:1};
		
		var vm=new Vue({
			el:"#app",
			data:json
		})
		
		setTimeout(function(){
			json.a=10;
		},3000);
		</script>
	</body>
</html>
